Chandler Elliott

02/09/2023 · High School

\[ \begin{array}{l}\text { i. } \frac{7}{33} \quad \text { ii. } \frac{19}{24} \quad \text { iii. } 1 \frac{11}{16} \text { iv } \frac{2}{3} \quad \text { v. } \frac{5}{6} \\ \text { b. A concrete mixture contains seven parts by volume of ballast, four parts by volume } \\ \text { of sand and two parts by volume of cement. Determine the percentage of each of these three } \\ \text { constituents correct to the nearest } 1 \% \text { and the mass of cement on a tonne of dry mix. } \\ \text { c. In a sample of iron ore, } 18 \% \text { is iron. How much ore is needed to produce } 3600 \mathrm{~kg} \text { of } \\ \text { 13. Determine the value of; } \\ \text { a. } \frac{7}{6} \text { of }\left(3 \frac{1}{2}-2 \frac{1}{4}\right)+5 \frac{1}{8} \div \frac{3}{16}-\frac{1}{2} \\ \text { b. }\left(\frac{2}{3} \times 1 \frac{1}{4}\right) \div\left(\frac{2}{3}+\frac{1}{4}\right)+1 \frac{3}{5} \\ \text { c. } \frac{1}{2}+\frac{3}{5} \div\left(\frac{8}{15}-\frac{1}{3}\right) \times \frac{3}{2} \div \frac{9}{4} \\ \text { d. If a storage tank holding } 450 \text { litres when it is three quarters full, how much }\end{array} \] will it contain when it is two thirds full?